CCleaner crashes in the middle of cleaning, does not complete

Latest 64bit version downloaded.

Registry cleaner runs fine.

CCleaner "clean" analyzes files fine.

During clean, crashes.

Running Win7 SP1 64bit on an i3.

Ran it without shutting down Firefox (this forum open) ...It worked.

Any help would be appreciated.

Do you have any idea which specific entry in Firefox is causing the issue? I'd suggest clearing your history/cache etc from within firefox and trying again. CTRL SHIFT DEL in Firefox will open the prompt to do this